Electrochemical Studies on [U(dmso)9]4+ and [UO2(dmso)5]2+ (dmso = dimethyl sulfoxide) Complexes in DMSO

Seong Yun Kim, Koichiro Mizuoka, Kohji Mizuguchi, Tomoo Yamamura, Yoshinobu Shiokawa, Hiroshi Tomiyasu, Yasuhisa Ikeda

研究成果: Article査読

9 被引用数 (Scopus)

抄録

Electrochemical studies on [U(dmso)9]4+ and [UO2(dmso)5]2+ complexes in DMSO containing tetrabutylammonium perchlorate(TBAP) as supporting electrolyte have been carried out by using cyclic voltammetry(CV). A three electrode system was utilized, i.e. Pt working, Ag/Ag+ in TBAP/CH3CN reference, and Pt auxiliary electrodes. A ferrocene/ferrocenium (Fc/Fc+) couple was used as a reference redox system. Measurements of CV were carried out in the range of -0.025 to -2.025 V and -0.025 to -1.175 V for [U(dmso)9]4+ and [UO2(dmso)5]2+ complexes, respectively It was found that the [UO2(dmso)5]2+ complex is reduced quasi-reversibly to U(V) at around -1.0 V, and that the [U(dmso)9]4+ complex is reduced quasi-reversibly to U(III) at around -0.93 V and the resulting U(III) species is further reduced to U(0) irreversibly at around -1.7 V. The formal redox potentials(vs. Fc/Fc+) for U(VI)/U(V) and U(IV)/U(III) couples were determined to be -0.970 and -0.901 V, respectively Furthermore, in order to examine whether the [U(dmso)9]4+ complex is oxidized to U(V), the cyclic voltammogram was measured in the range of -0.025 to +0.975 V at the scan rate of 0.05V/s. Any anodic and cathodic peaks were not observed within the potential window. This indicates that the [U(dmso)9]4+ complex is not oxidized to [Uv(dmso)9]5+. These results suggest that the U(V) species in non-aqueous solvents can be present more stably as yl-type(UO2+) than as U5+ type.

本文言語English
ページ(範囲)441-444
ページ数4
ジャーナルjournal of nuclear science and technology
39
DOI
出版ステータスPublished - 2002 11

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学

フィンガープリント

「Electrochemical Studies on [U(dmso)<sub>9</sub>]<sup>4+</sup> and [UO<sub>2</sub>(dmso)<sub>5</sub>]<sup>2+</sup> (dmso = dimethyl sulfoxide) Complexes in DMSO」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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